Chaffing-screen.



D. T. BODLE.

GHAPFING SCREEN.

APILIOATION FILED NOV. 22, 1911.

1,068,302. Patented July 22, 1913.

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APPLICATION FILED NOV. 22, 1911.

1,068,302. Patented July 22, 1913.

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%MWM$ mym ammo/whoa Snowing WNTTED STATES PATENT OFFICE.

DAVID T. BODLE, OF GAYLORD, KANSAS.

CHAFFING-SCREEN.

To all whom it may concern:

Be it known that 1, DAVID T. Room, a citizen of the United States,residing at Gaylord, in the county of Smith and State of Kansas, haveinvented new and useful lmproven'ients in Chafing-Screens, of which thefollowing is a specification.

This invention relates to threshing machines, and it has particularreference to a chatling screen of simple and improved construction.

One object of the invention is to provide a chatting screen having aplurality of narrow channels separated by upstanding wall.lllOll'lbGl'S, and each of said channels being provided with slots andwith downwardly extending deflectors, the object being to facilitate andimprove the separation of grain from the broken straw and headsconstituting the relatively heavy portions that are separated from thelight straw as the latter passes over the straw rack to the strawcarrier whereby it is expelled at the tail end of the machine, thematerial to be operated upon being directed into the longitudinalchannels between the upstanding walls, whereby said material isdistributed over the entire area of the screen, being thus effectivelysubjected to the air currents coming from the fan.

A further object of the invention is to simplify and improve theconstruction of the chatting screen.

With these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

in the accompanying drawings has been illustrated a simple and preferredform of the invention, it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited,but that changes, alterations and modification within the scope of theclaims may be resorted to when desired.

In the drawings,Figure 1 is a plan View of a portion of a chailingscreen constructed in accordance with the invention. Fig. 2 is alongitudinal sectional view, enlarged, taken on the line 22 in Fig. 1.Fig. 3 is a transverse sectional view, enlarged, taken on the line 33 inFig. 1. Fig. 4 is a perspec- Specification of Letters Patent.

Application filed November 22, 1911.

Patented July 22, 1913. Serial No. 661,775.

tive detail view showing a portion of one of the members or units usedin the construction of the screen and showing also portions of adjacentunits, parts being broken away to clearly show the construction. Fig. 5is a bottom plan view of a portion of the screen.

Corresponding parts in the several figures are denoted by likecharacters of reference.

The frame of the improved screen is composed of cross bars 1, 1 uponwhich the upstanding side members 2, 2 are suitably secured, said framebeing constructed of wood or other suitable material.

The screen proper is composed of a plurality of units A, each of saidunits consisting of a strip of sheet metal having upturned side edges 3,3 so to constitute an elongated trough or channel. The side edges orwall members 3, 3 are beveled at their front ends, as shown at a, andthe side Ill01l'l her 3 of each unit is provided at its upper edge andat its front end with downturned flanges 5 and overlapping the upperedge of the wall member 8 of the adjacent proximate unit, the unitsbeing secured together by any suitable fastening means, such as rivets6, extending through the flange portions 5 of the units 3 and throughthe portions of the wall members 3 engaged by said flange portions. Theunits A may in prac tice be made of a width of approximately two inches,and the upstanding wall mem bers may be of a height of one and a halfinches, any suitable number of units being employed to produce a screenof the desired width. The outer wall members of the units at the sideedges of the screen may be suitably trimmed and secured upon theupstanding side members 2 of the screen frame, the cross bars of whichsupport the front and rear ends of the units which may be securedthereon in any suitable manner. The bottom of each unit is provided withangular slots forming tongues 7 which are bent or deflected downwardlyat any desired angle to insure the most eilicient operation of thedevice.

In operation, the improved chatting screen is supported in the casing ofa threshing machine adjacent to the grain pan and also in rear of andbelow the straw rack in such a position as to receive the relativelyheavy material discharged over the straw rack and which includes brokenstraw to which grain adheres and broken heads having grain adheringthereto. This material when dropping upon the chafling screen will bebroken up by the upstanding ridges or wall members as it drops into thegrooves or channels formed by the units of which the screen is made up.The material will thus be effectively subjected to the blast coming fromthe fan, the grain being separated from the straw and heads so that thekernels will slide down the inclined tongues and drop upon the grainbottom, while the remaining material is carried rearwardly over thescreen, it being understood that the screen is to be hung or supportedin such a manner as to receive a shaking motion, as is usually the case.The material may be discharged over the chafling screen to the tailingsspout, or an intermediate tailings screen may be 'used, if desired, suchtailings screen being constructed in like manner as the chatting screen,but supported in such a manner as to be inclined in the direction of thetailings spout.

Important advantages of the particular construction of the screen asherein shown and described are, first, that the screen being composed ofa plurality of units, the said units may be used for building up ascreen of any desired width to fit any particular make of grainseparator that may be desired; second, in the event of injury to thescreen, such injury may usually be repaired by removing and replacing asingle unit. It will, furthermore, be found that where the units arejoined together, the flange associated with the side wall of one unitwill overhang and partly envelop the side wall of the proximate unit,thereby forming a reinforced and very durable construction.

Having thus described the invention, what is claimed as new, is

1. In a chatting screen, a screen unit consisting of a channel-shapedpiece of sheet metal having upstanding side members, one of which isprovided with a downturned flange, said unit being provided with bottomslots and downwardly deflected tongues.

2. In a ehafling screen, a screen unit consisting of a channel-shapedpiece of sheetmetal having upstanding side walls beveled at their frontends, one of said wall members being provided with downturned flanges atits upper and front ends, and the bottom of the unit being provided withslots and with downwardly deflected tongues.

3. A chatting screen made up of a plurality of integral units of similarconstruction connected together along their proximate longitudinaledges.

4:. A chatting screen including a plurality of channel-shaped unitshaving upstanding side walls, one side wall of each unit being providedwith a downturned flange engaging the side wall of a proximate unit.

A chafling screen including a plurality of channel-shaped units havingupstanding wall members beveled at their front ends, one wall member ofeach unit being pro vided with downturned flanges engaging and securedupon a wall member of a proximate unit.

6. A chafling screen comprising a frame including front and rear crossbars and upstanding side members secured thereon, and a plurality ofchannel-shaped units mounted upon the front and rear cross bars andhaving upstanding wall members suitably connected together, theoutermost wall mem ber of the units adjacent to the side members of theframe being suitably trimmed and secured upon said side members, and thebottom of each channel-shaped unit being provided with slots and withdownwardly deflected tongues.

In testimony whereof I aflix my signature in presence of two witnesses.

DAVID T. BODLE.

Witnesses 2 IV. C. OULLOM, G120. R. PARKER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

